Griffin Hospital has tested about 750 patients for an array of blood-borne diseases, including HIV, in the weeks following the announcement that some nurses at the hospital misused insulin pens.

On May 16, Griffin officials revealed that some nurses used the tube-shaped injector piece of the devices on more than one patient, leading to possible contamination. The misuse happened between Sept. 1, 2008, when the hospital started using the pens on diabetes patients, and May 14, when the hospital stopped using them. Griffin sent letters to the 3,149 patients on whom the products had been used, urging them to get tested for hepatitis B, hepatitis C and HIV.

As of Tuesday, 817 people had scheduled appointments for testing, and about 750 had been tested (about 25 on Tuesday alone). Griffin representatives didn't know whether results were available yet for any of the tests.